Gurobi 5.0.1 (linux64) logging started Fri Nov 16 19:04:47 2012 Optimize a model with 12446 rows, 16256 columns and 53086 nonzeros Presolve removed 31 rows and 3937 columns Presolve time: 0.23s Presolved: 12415 rows, 12319 columns, 49149 nonzeros Variable types: 0 continuous, 12319 integer (12319 binary) Found heuristic solution: objective 47.0000000 Root relaxation: objective 2.000000e+00, 11690 iterations, 0.71 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 2.00000 0 162 47.00000 2.00000 95.7% - 3s H 0 0 3.0000000 2.00000 33.3% - 3s 0 0 2.00000 0 358 3.00000 2.00000 33.3% - 7s 0 0 2.00000 0 263 3.00000 2.00000 33.3% - 16s 0 0 2.00000 0 261 3.00000 2.00000 33.3% - 26s 0 0 2.00000 0 259 3.00000 2.00000 33.3% - 34s 0 0 2.00000 0 276 3.00000 2.00000 33.3% - 42s 0 0 2.00000 0 259 3.00000 2.00000 33.3% - 51s 0 0 2.00000 0 276 3.00000 2.00000 33.3% - 59s 0 0 2.00000 0 276 3.00000 2.00000 33.3% - 71s 0 0 2.00000 0 259 3.00000 2.00000 33.3% - 80s 0 0 2.00000 0 276 3.00000 2.00000 33.3% - 90s 0 0 2.00000 0 276 3.00000 2.00000 33.3% - 95s 0 2 2.00000 0 276 3.00000 2.00000 33.3% - 107s 2 3 2.00000 1 276 3.00000 2.00000 33.3% 9064 110s 5 5 2.00000 1 257 3.00000 2.00000 33.3% 3626 129s 6 6 2.00000 1 162 3.00000 2.00000 33.3% 3021 144s 7 6 2.00000 1 162 3.00000 2.00000 33.3% 2590 155s 8 7 2.00000 1 261 3.00000 2.00000 33.3% 2266 178s 9 8 2.00000 1 172 3.00000 2.00000 33.3% 2014 188s 11 9 infeasible 14 3.00000 2.00000 33.3% 20508 202s Cutting planes: Gomory: 6 Zero half: 2 Explored 13 nodes (524854 simplex iterations) in 204.27 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 3.000000000000e+00, best bound 3.000000000000e+00, gap 0.0%